Installing the Google Scholar extension from the chrome webstore leads to clicking on the button never expanding fully (image below showing this). There should be a small window with suggested citations and a search bar.
Installing the firefox edition of the extension shows suggested citations when on an academic website, but I am unable to use the search bar outside of those specific websites.
There should be a window for searching similar to the extension preview images:
0.99.129-beta
Sequoia (15)